206 lines
4.0 KiB
C
206 lines
4.0 KiB
C
/*
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* Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <linux/stat.h>
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#include <errno.h>
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#include <malloc.h>
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#include <getopt.h>
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#include <xfuncs.h>
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#include <init.h>
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#include <ioctl.h>
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#include <nand.h>
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#include <linux/mtd/mtd-abi.h>
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struct nand_bb {
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struct device_d device;
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struct device_d *physdev;
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int open;
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struct mtd_info_user info;
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off_t offset;
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};
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static ssize_t nand_bb_read(struct device_d *dev, void *buf, size_t count,
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unsigned long offset, ulong flags)
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{
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struct nand_bb *bb = dev->priv;
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int ret;
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printf("%s %d %d\n", __func__, offset, count);
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ret = dev_ioctl(bb->physdev, MEMGETBADBLOCK, (void *)bb->offset);
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if (ret < 0)
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return ret;
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if (ret) {
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printf("block is bad\n");
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bb->offset += bb->info.erasesize;
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}
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ret = dev_read(bb->physdev, buf, count, bb->offset, flags);
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if (ret > 0)
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bb->offset += ret;
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return ret;
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}
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static ssize_t nand_bb_write(struct device_d *dev, const void *buf, size_t count,
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unsigned long offset, ulong flags)
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{
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struct nand_bb *bb = dev->priv;
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int ret;
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printf("%s %d %d\n", __func__, offset, count);
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ret = dev_ioctl(bb->physdev, MEMGETBADBLOCK, (void *)bb->offset);
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if (ret < 0)
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return ret;
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if (ret) {
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printf("block is bad\n");
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bb->offset += bb->info.erasesize;
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}
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ret = dev_write(bb->physdev, buf, count, bb->offset, flags);
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if (ret > 0)
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bb->offset += ret;
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return ret;
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}
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static int nand_bb_open(struct device_d *dev, struct filep *f)
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{
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struct nand_bb *bb = dev->priv;
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int ret;
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if (bb->open)
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return -EBUSY;
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bb->open = 1;
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bb->offset = 0;
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return 0;
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}
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static int nand_bb_close(struct device_d *dev, struct filep *f)
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{
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struct nand_bb *bb = dev->priv;
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bb->open = 0;
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return 0;
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}
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static int nand_bb_probe(struct device_d *dev)
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{
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struct nand_bb *bb = dev->priv;
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int ret = 0;
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ret = dev_ioctl(bb->physdev, MEMGETINFO, &bb->info);
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if (ret < 0)
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goto out;
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printf("new info: %d\n", bb->info.erasesize);
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return 0;
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out:
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free(bb);
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return ret;
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}
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static int nand_bb_remove(struct device_d *dev)
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{
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return 0;
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}
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struct driver_d nand_bb_driver = {
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.name = "nand_bb",
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.probe = nand_bb_probe,
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.remove = nand_bb_remove,
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.open = nand_bb_open,
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.close = nand_bb_close,
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.read = nand_bb_read,
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.write = nand_bb_write,
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};
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static int nand_bb_init(void)
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{
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return register_driver(&nand_bb_driver);
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}
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device_initcall(nand_bb_init);
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static int do_nand (cmd_tbl_t *cmdtp, int argc, char *argv[])
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{
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int ret, opt;
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char *device = NULL;
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struct device_d *dev;
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struct nand_bb *bb;
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getopt_reset();
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while((opt = getopt(argc, argv, "m:")) > 0) {
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switch(opt) {
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case 'm':
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device = optarg;
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break;
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}
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}
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if (device) {
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dev = get_device_by_path(device);
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if (!dev) {
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printf("no such device: %s\n", argv[1]);
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return 1;
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}
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bb = xzalloc(sizeof(*bb));
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sprintf(bb->device.id, "%s.bb", dev->id);
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strcpy(bb->device.name, "nand_bb");
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bb->device.priv = bb;
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bb->device.size = dev->size; /* FIXME: Bad blocks? */
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bb->physdev = dev;
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if (register_device(&bb->device))
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goto free_out;
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dev_add_child(dev, &bb->device);
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}
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free_out:
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return 0;
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}
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static const __maybe_unused char cmd_nand_help[] =
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"Usage: nand bla\n";
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U_BOOT_CMD_START(nand)
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.maxargs = CONFIG_MAXARGS,
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.cmd = do_nand,
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.usage = "",
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U_BOOT_CMD_HELP(cmd_nand_help)
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U_BOOT_CMD_END
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